A 15 year-old gold bullion robbery leads the Maryhill team on a race against time as one by one the robbers are murdered. With pirates, treasure chests and secret maps to buried treasure muddying the waters will the team solve the murders and find the lost treasure before the last robber is killed?

The bizarre murders of opponents and ex-members of a religious cult have the team baffled. Each murder follows the Biblical plagues of egypt which according the Book of Revelation will proceed Armageddon. There are more than fifty members of the cult, most of whom would kill if asked to do so by the cult leader, David Burns. Who is responsable and who will be next?